The Eo is a river, 91 kilometres (57 mi) long, in northwestern Spain. Its estuary forms the boundary between the regions of Galicia and Asturias. The river is known for its salmon fishing.

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Quick Facts Location, Country ...

Eo
View of Eo River, Ramsar Site
Location
Country	Spain
Physical characteristics
Source
• location	Baleira
• elevation	850 m (2,790 ft)
Mouth
• location	Atlantic
Length	91.5 km (56.9 mi)
Basin size	819 km2 (316 sq mi)
Discharge
• average	20.11 m3/s (710 cu ft/s)
Ramsar Wetland
Official name	Río Eo
Designated	4 October 1994
Reference no.	705[1]

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In the western Cantabrian mountains the river forms the axis of one of Asturias 7 biosphere reserves, the Eo river, Oscos and Terras de Burón Biosphere Reserve.^[2]

• List of rivers of Spain
• Rivers of Galicia